i dont think you have to do all that if you just wanna peactivate
daz loader does it all for you, read the daz loader readme

you need to have folders, Sources\$OEM$\$$\SETUP\SCRIPTS\
In the SCRIPTS folder place these files from Daz's Loader,
Place Windows Loader.exe and keys.ini along with the setupcomplete.cmd file in the SCRIPTS folder.

SetupComplete.cmd Example:

@ECHO OFF
%~dp0"Windows Loader.exe" /silent /preactivate
cd %~dp0
attrib -R -A -S -H *.*
SHUTDOWN /R /T 5
RMDIR /S /Q "%WINDIR%\Setup\Scripts"
exit
-------------------------------------------------------
the certificate it will default to your BIOS's model
the SLIC it will default to your BIOS's model
the key it will default to your BIOS's model and the correct one for the OS (Ultimate, Professional, Starter or Home Premium)
unless you set these using the arguments, in daz loader readme

so if all you wanna do is pre activate a dvd, thats all you need to do by the look of it
edit: but i just noticed you want it not to install loader if bios has slic2.1
i dont know what happens in that situation